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Date: Mon, 26 Oct 2015 11:20:57 -0400 (EDT)
From: cve-assign@...re.org
To: xiaoqixue_1@....com
Cc: cve-assign@...re.org, oss-security@...ts.openwall.com
Subject: Re: CVE Requests for read out of bound in libpng

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> there is a memory read out of bound in libpng 1.2.* and 1.4.* , which
> is used in many operate systems and applications. it may leak
> information in the application .

> this bug has been accepted and fixed in LIBPNG :
> http://sourceforge.net/p/libpng/bugs/241/

>> function png_convert_to_rfc1123 in png.c

>> when ptime->month is 0 (which gains from tIME chunk data ), the
>> short_months[(ptime->month - 1) % 12] will return the memory before
>> short_months

>>> We'll take care of the bug by using "ptime->month - 1U" to ensure that
>>> the "%" operation returns a value in the range 0..11

Use CVE-2015-7981.

- -- 
CVE assignment team, MITRE CVE Numbering Authority
M/S M300
202 Burlington Road, Bedford, MA 01730 USA
[ PGP key available through http://cve.mitre.org/cve/request_id.html ]
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